Found this interesting CD 115 HEMINGRAY in a lot of insulators I bought at Springfield this November. Basically a ho-hum 10, except the "0" of 10 is missing, or so it seems. All of the embossing is crisp and clean. However, the mold engraver didn't punch the "0" hard enough to make it match the other lettering. Have never seen this variation before nor seen it listed anywhere. You can barely see the "0". I don't think it to be a clogged or worn mold as all of the other embossing is so nice and crisp. Something a little different. Pays to take that second look. You sometimes find something neat !!!